Designation:D3985−05(Reapproved2010)´1StandardTestMethodforOxygenGasTransmissionRateThroughPlasticFilmandSheetingUsingaCoulometricSensor1ThisstandardisissuedunderthefixeddesignationD3985;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditorialchangesweremadethroughoutinNovember2010.1.Scope1.1Thistestmethodcoversaprocedurefordeterminationofthesteady-staterateoftransmissionofoxygengasthroughplasticsintheformoffilm,sheeting,laminates,coextrusions,orplastic-coatedpapersorfabrics.Itprovidesforthedetermi-nationof(1)oxygengastransmissionrate(OTR),(2)thepermeanceofthefilmtooxygengas(PO2),and(3)oxygenpermeabilitycoefficient(P'O2)inthecaseofhomogeneousmaterials.1.2ThistestmethoddoesnotpurporttobetheonlymethodformeasurementofOTR.TheremaybeothermethodsofOTRdeterminationthatuseotheroxygensensorsandprocedures.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1434TestMethodforDeterminingGasPermeabilityChar-acteristicsofPlasticFilmandSheetingD1898PracticeforSamplingofPlastics(Withdrawn1998)3E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodF1927TestMethodforDeterminationofOxygenGasTrans-missionRate,PermeabilityandPermeanceatControlledRelativeHumidityThroughBarrierMaterialsUsingaCoulometricDetector3.Terminology3.1Definitions:3.1.1oxygenpermeabilitycoeffıcient(P'O2)—theproductofthepermeanceandthethicknessoffilm.Thepermeabilityismeaningfulonlyforhomogeneousmaterials,inwhichcaseitisapropertycharacteris...
